Sorry if this is posted before, but I didn't find it fast enough in the search...

where is the cheapest place to buy knock sensor?

my car finally threw the code, and I have been running poorly at the track, I have my fingers crossed on the KS...

 

www.thepartsbin.com
$109 and free ground shipping. 3 days is all it took to get to my door.

 

anyone else know anywhere, or is that the best? im about to order.

 

I think there was a guy named ^Riot or something...search for "Riot" who was selling them for 100 shipped, but that was a couple months ago. Good luck.

 

I was told by a nissan tech that the ecu in the 4th gen was not designed to detect knock sensor failure. the KS code is due to some other code which you should be getting. the KS listens for irregfular sounds inthe engine and therefore lowers timing. if you are gettin the KS code it is because the KS is detecting an irregular sound due to something else which needs to be replaced its not that the KS itself is bad...it is what he calls a ghost code. anyway i was told this because i went to buy a KS at viking nissan here in RI and he told me "why do you need a KS" i haven't replaced one of those things in 6 years i've been here. i told him that i was getting the code. so he told me to replace the o2 sensor(which was the other code i was getting) and that the KS would go away. that kinda went against what i've heard on the org but i didn't wanna insult the guy so i just bought the o2 sensor. i put it in and Bammmmm there came back my lowend and there was no check engine light. I just wanted to let you know that before you went ahead adn bought a knock sensor for 100+

 

gosh now you are making me nervous.. I do not have any other codes beside knock sensor (no CEL... i just keep checking it) and so i dont see what else i should replace, but I know my car is not as fast as it should be / was... I dont really know what else to replace/check so i think i'll get the ks unless there is some other advice - i just cant take being slower anymore (got beat at the track by a civic last night!!!! granted it was jackson racing supercharged and nos.... sad thing is he only ran 10.2 where i run consistent mid 9's... I had new tires and bogged off the line running 1/10th slower then he, i was ready to total my car into a telephone pole after that run!! first i got beat by a civic, then i realized i ran in the 10's hahah (all #'s 8th mile of course!)

 

When I replaced my KS, it was the only code I was getting, and it hasn't come back yet. I'm not sure if I really did get my "lost power" back, or if it was all in my head. I also read that if you get the KS code with o2 sensor codes, then you should replace your o2 sensors first, and that usually fixes the KS. But in your case, if you're ONLY getting the KS code, then I would test it first, and then if it's bad go ahead and replace it. Oh, and to confuse you a little more, sometimes it tests within spec, but is still bad. Good luck. Any questions, feel free to e-mail or PM me!

 

ok, im buying one, replacing it, and seein what happens haha

 

I mean, I'm no expert, but I've had the same problem that you're having, and everything's good now.

You're ONLY getting the KS code, so I'd have to lean towards a problem with.....the KS. It's not too hard to install. There is a write-up around here somewhere. If you live by an elementary school, I recommend hiring one of them to install it. If you've read up on how the install goes, you'll understand.

 

just got off the phone with them.. they said they dont have them and dont get them...

 

i get the MAF code and KS, but i started my engine without the intake together, so i reassembled, reset ECU, and only KS came back....nissan tech told me the same thing, but i just changed the KS anyways.....gas mileage = impressive....car just seems hella faster now too

 

damn expensive for a sensor

 

try courtesy nissan...i think they are like 130ish

 

I purchased from Courtesy for 131$ plus 7$ shipping

 

If you can find a Mechanic that works for Nissan then you can get it for $118. Good luck.

 

If you want to improve your car's performance while waiting for a knock sensor, just disconnect the KS harness from the KS and attach a 570 kohm resistor in series to ground. That way the ECM thinks you have a perfectly working KS.

I did that after my CEL indicated I was having a KS problem. Not only did it verify the KS as being definitely bad (haven't had any codes thrown since) but it really smoothed out the engine in the higher rpms. You probably don't want to take your car to the track with it set up like this, but for everyday driving (in the interim) it works great.

 

damn, i need one too. I think that is the villain causing my loss of power and poor gas mileage. I dont have a CEL, but a trusted mechanic ran a diagnostic and got a broken knock sensor code. No wonder i was getting as much gas mileage as a v8 domestic.
Also, can a broken knock sensor be the cause of hard starts?

 

When I called they said the same thing. The reason I called was because there was no price listed...and it said to call for availability. So I was about to give up. I checked their site a week later and it was listed for $109...and ordered it on the spot online. Just try in about a week and see what happens.

 

Did you think about what the knock sensor does before doing this, your knock sensor detects pings and advances or retards the spark so your car won't ping, so right now your car has no way to tell when or if it should adjust the spark. I'd be real carefull driving with the setup as it is now.

 

Knock sensors don't change the timing themselves. It only detects high freq sounds that it thinks is detonation. It sends the info to the ecu and the ecu will RETARD the timing a set amount depending on how much signal from the KS it receives. There is no provision in the ecu for advancing the timing based on signals from the KS.

 

try www.nissanparts.cc

i bought one from there for about 120. i forgot the part number, but i am srue you could just do a search on here and find it out i know it has been mentioned before.

 

Why, yes, I did think about that. That's why I was careful to say that this should be done only on a temporary basis while you are waiting for a knock sensor, and that it would be better not to run it at the track this way.

That being said, if you know your engine is otherwise in good condition and not detonating, and if you are running 93 octane gas, then there is no harm in doing this. After all, engines were running fine without knock sensors for quite a long time before knock sensors arrived on the scene. And in cases of serious detonation that would actually harm your engine, you have no trouble detecting the sound with the knock sensors attached to the sides of your head.

 

I know this but with out it the computer has no clue as to whether or not the engine is detonating or not. Also would the computer not advance the timing back to where it was after the knock sensor has stoped sending it indications of pings, so even if it does not act directly on the knock sensor signal if there is not one it will advance the timing. Right? I'm not being a smart a** just asking a question.